Kiichiro Nishina

Kiichiro Nishina, Yokohama-Shi JP

Patent application number

Description

Published

20080218724

ILLUMINATION UNIT, IMAGE READ APPARATUS, IMAGE FORMATION APPARATUS - An illumination unit for use in an image read apparatus is provided which illuminates a surface of an original document with illumination light, reads an image of the original document by a light receiving element, and adjusts an amount of specular light reflection from the surface of the original document on a light receiving plane of the light receiving element by adjusting at least one of an incident angle of the illumination light and a divergence thereof. It includes a plurality of light source units emitting the illumination light and arranged in a direction so that a direction in which intensity of light emitted from at least one of the light source units closest to a center of the arrangement thereof is to be highest makes a non-perpendicular angle with the direction of arrangement.

09-11-2008

20080278779

IMAGE READING APPARATUS AND IMAGE FORMING APPARATUS - An image reading apparatus includes: a light source which irradiates illumination light to a document; an imaging element which images reflected light of the illumination light from the document; a color separator which performs color separation of the illumination light or the reflected light into at least three wavelength ranges including a first wavelength range, a second wavelength ranges and a third wavelength range; a light-receiving element which converts the reflected light imaged by the imaging element into an electrical signal as a document image of the document, for each of the at least three wavelength ranges; and an image processor which classifies the document image on the basis of the electrical signal in the first wavelength range and in the second wavelength range.

11-13-2008

20090213440

IMAGE READER AND IMAGE FORMATION APPARATUS - An image reader feeds a document to read document information at a still position from below a glass platen. The image reader is configured to include a document feeder unit feeding a document in a predetermined direction, a glass platen provided below the document feeder unit, an illumination unit provided on or above the glass platen and including a surface light source which is long in a direction orthogonal to the predetermined direction and illuminates the document, and a document reader unit reading document information at a still position from below the glass platen. Such an image reader can illuminate documents efficiently with less electric power and achieve thinning of the illumination unit.

08-27-2009

20090237750

IMAGE READING DEVICE AND IMAGE FORMING APPARATUS - An image reading apparatus includes a plurality of light sources to illuminate a document; an illumination optical system to guide light to a reading target area having a length and a width; a document illuminating device to illuminate the entire document; an image forming optical system to form an image from light reflected from the document; and a sensor provided in an image forming section of the image forming optical system to read the image of the document. The illumination optical system includes a concentration section to control light diffusion, and a reflection section. The reflection section includes at least two integrally configured reflection surfaces, in which a sine value of an angle of reflected light from at least one reflection surface is positive, while a sine value of an angle of reflected light from the rest of at least one reflection surface is negative.

09-24-2009

20090323139

LIGHTING UNIT, IMAGE READING APPARATUS AND IMAGE FORMING APPARATUS USING THE SAME - A lighting unit, includes: a light source section wherein a plurality of light-emitting sources are arranged in a direction perpendicular to a direction of each light-emitting optical axis of each light-emitting source and linearly at predetermined intervals; and a reflecting section which reflects light emitted toward a direction along a document mounting surface from the light source section arranged along the document mounting surface toward an irradiated region of the document mounting surface, the reflecting section having: a first reflecting surface disposed closer to the light source section than to the irradiated region; and a second reflecting surface disposed more distant from the light source section than from the irradiated region.

12-31-2009

20100007929

IMAGE READ-OUT DEVICE AND IMAGE FORMING DEVICE - The image read-out device comprises an integrally formed scanning optical unit in which a light source which emits light toward a document, a plurality of reflective mirrors reflecting the light which is emitted from the light source to the document and then reflected, an image forming lens converging the light reflected by a final reflective mirror which finally reflects the light, among the plurality of mirrors, and a light receiving sensor for receiving the light converged by the image forming lens are integrally mounted on a housing, the integrally formed scanning optical unit moving in a scanning direction and reading out an image of the document, wherein an opening is provided on each of top and bottom surfaces of the housing, and wherein the area of the opening provided on the bottom surface is equal or more than that of the opening provided on the top surface.

01-14-2010

20100027079

OPTICAL READER, IMAGE READER AND IMAGE FORMING DEVICE - An optical reader which reads image information on an original document by moving to the original document includes an illumination unit having at least one light source arranged on a substrate and illuminating the original document, a plurality of mirrors reflecting reflection light from the original document, a focusing lens focusing the reflection light from the original document reflected by the mirrors, and a photoelectric conversion element arranged in a focusing position of the focusing lens, a normal direction of an emission surface of the light source and a normal direction of a light-receiving surface of the photoelectric conversion element are the same direction, an original document reading position is set near an end portion of the optical reader in the normal direction.

02-04-2010

20130114053

IMAGE DISPLAY DEVICE - An image display device includes an image display element, a light source, an illumination system, a projector system comprising a refractive optical system including a plurality of lens groups, and a mirror train including a curved mirror, a first focus structure configured to move the respective lens groups of the refractive optical system by different amounts along a normal line of the image display element, and a second focus structure configured to move the respective lens groups along the normal line of the image display element by different amounts from those of the first focus structure.

05-09-2013

20130242362

IMAGE-FORMING LENS, IMAGE READER, AND IMAGE-FORMING DEVICE - An image-forming lens includes, in order from an object side to an image side, a first group having a negative power as a whole, the first group consisting of a positive meniscus lens having a convex surface on the object side and a negative meniscus lens having a convex surface on the object side, the positive meniscus lens and the negative meniscus lens being cemented, an aperture stop, a second group consisting of a positive meniscus lens having a convex surface on the image side, a third group consisting of a positive meniscus lens having a convex surface on the image side, a fourth group consisting of a lens having a negative power, and a fifth group consisting of a biconcave lens.

09-19-2013

20140126045

MAGNIFICATION OPTICAL SYSTEM - A magnification optical system forms an enlarged image of an object. It includes a refractive optical system including a plurality of lens groups; and a mirror train including a curved mirror, arranged in this order from an object side, a first focus structure configured to move the respective lens groups of the refractive optical system by different amounts along a normal line of a conjugate surface on the object side, and a second focus structure configured to move the respective lens groups along the normal line of the conjugate surface on the object side by different amounts from those of the first focus structure.

05-08-2014

20150062696

MAGNIFICATION OPTICAL SYSTEM - A magnification optical system forms an enlarged image of an object. It includes a refractive optical system including a plurality of lens groups; and a mirror train including a curved mirror, arranged in this order from an object side, a first focus structure configured to move the respective lens groups of the refractive optical system by different amounts along a normal line of a conjugate surface on the object side, and a second focus structure configured to move the respective lens groups along the normal line of the conjugate surface on the object side by different amounts from those of the first focus structure.

03-05-2015

Patent applications by Kiichiro Nishina, Yokohama-Shi JP

Kiichiro Nishina, Kanagawa JP

Patent application number

Description

Published

20100020367

IMAGE READING DEVICE AND IMAGE FORMING APPARATUS - Disclosed is an image reading device configured to read information of an object, including an imaging optical system configured to image an image of an object and an image-capturing device configured to image-capture at least a portion of the image imaged by the imaging optical system, wherein the imaging optical system includes a first optical system configured to image an intermediate image of the object and a second optical system configured to image the imaged image of the intermediate image.

ENLARGEMENT OPTICAL SYSTEM - Disclosed is an enlargement optical system configured to form an image of an object at an enlargement side, including a lens system and a mirror system in order from a side of the object, the lens system including at least one lens, the mirror system including a first mirror and a second mirror in order from a side of the object, and the second mirror being an concave mirror, wherein an intermediate image conjugate to the object is formed at a side of the object with respect to the second mirror and the first mirror is held to be capable of adjusting a position thereof.